CVE-2026-12313: Vulnerability in Mozilla Firefox
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
AI Analysis
Technical Summary
CVE-2026-12313 is an information disclosure and sandbox escape vulnerability within the Security: Process Sandboxing component of Mozilla Firefox. It was reported by researcher evyatar and assigned moderate impact by Mozilla. This vulnerability was addressed and fixed in Firefox 152 and Firefox ESR 140.12 as part of a comprehensive security update that included multiple high-impact fixes. The vendor advisories confirm the availability of patches and remediation for this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment and disclose sensitive information from the Firefox process sandbox. This could potentially undermine the security isolation provided by the sandbox, increasing the risk of further compromise. The impact is rated moderate by Mozilla, indicating a significant but not critical risk.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 152 and Firefox ESR 140.12. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official patches.
CVE-2026-12313: Vulnerability in Mozilla Firefox
Description
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
CVSS v3.1
Score 4.7medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12313 is an information disclosure and sandbox escape vulnerability within the Security: Process Sandboxing component of Mozilla Firefox. It was reported by researcher evyatar and assigned moderate impact by Mozilla. This vulnerability was addressed and fixed in Firefox 152 and Firefox ESR 140.12 as part of a comprehensive security update that included multiple high-impact fixes. The vendor advisories confirm the availability of patches and remediation for this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment and disclose sensitive information from the Firefox process sandbox. This could potentially undermine the security isolation provided by the sandbox, increasing the risk of further compromise. The impact is rated moderate by Mozilla, indicating a significant but not critical risk.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 152 and Firefox ESR 140.12. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:15.915Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-58/","vendor":"Mozilla"}]
Threat ID: 6a314c810b89be6888b4cd63
Added to database: 6/16/2026, 1:15:45 PM
Last enriched: 6/16/2026, 1:45:13 PM
Last updated: 6/17/2026, 4:57:01 AM
Views: 10
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